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Old 05-10-2016, 06:36 AM   #1
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Jayflight water lines tested to 120 PSI ?

Our dealer setup our 2016 34RSBS at our seasonal site with a high quality new water hose.
They did not install a pressure reducer on the hose.
I called the dealer with some other questions and he told me they did some tests at the dealership and found the units do not need the reducer. He also said Jayco water lines are tested to 120 PSI and they use a high quality water line.
He said they have found the reduced pressure to be a problem for some customers so they do not install the reducer.
I have installed a reducer despite what he said.
Has anyone heard of this 120 PSI testing ?
I was always told the reducer setback the pressure to 40 PSI, is that correct?
Thanks
Mike
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Old 05-10-2016, 09:16 AM   #2
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Call Jayco directly and ask them.
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Old 05-10-2016, 09:26 AM   #3
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I did some quick reading, and for a house 100psi is considered too much. 40 to 60 psi is what is expected and above that it is suggested that you put a pressure reducer on.

The fact that they are tested at 120psi (if its true) doesn't mean they are designed to live at that pressure.

Guns are also tested above normal operating pressure (called proof ) but shooting a proof round regularly could cause you to lose your face.
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Old 05-10-2016, 10:30 AM   #4
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120 PSI may be the design pressure as most plumbing systems in RV's use the same fixtures, PEX and fittings used in home construction. However, 120 PSI is way too much for normal operation. Around 40 PSI is more appropriate. If you have a flow problem with a reducer you can get a high volume reducer. I would not stay connected to a system with 120 PSI. Dealers surprise me every day with some of the goofy stuff the say.
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Old 05-10-2016, 10:51 AM   #5
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burst pressure might be 120, but max working pressure is around 60. Pex is Pex, it's all rated at pretty much the same pressure, the only difference is fittings, on houses the fitting are better quality! I would put a pressure reducer for sure!
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Old 05-10-2016, 11:11 AM   #6
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Our pressure regulator reduces to 50psi. I would not go over that no matter what the dealer says. He will forget the conversation if you have a water line burst.
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Old 05-10-2016, 12:01 PM   #7
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But the real question is: what is the pressure at the waterline from where you are getting your water?

If you have a good pressure reducer, and your incoming waterline pressure is already at 40 lbs, you will probably be fine. But one of those cheapo campco ones for a few bucks might restrict your flow even below that causing you problems. I agree with others that you certainly don't want to be operating at 120 psi.
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Old 05-10-2016, 12:42 PM   #8
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look at the printing on the PEX piping in yur trailer , it will have a max opperating pressure(probably 60psi) on it..
testing pressures are usually 1.5 times higher than operating pressures.
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Old 05-10-2016, 01:49 PM   #9
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A comment from the Zen camp:


Why expose your self (RV) to excessive stress?
The pipes may be able to hold 120PSI, but why risk a burst line, damaged appliances or water damage inside?


The pumps usually run to about 40psi. Isn't that enough?
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Old 05-10-2016, 04:21 PM   #10
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Totally agree and I plan to keep the pressure reducer in place dispite what the dealer tells me
Thanks
Quote:
Originally Posted by mike837go View Post
A comment from the Zen camp:


Why expose your self (RV) to excessive stress?
The pipes may be able to hold 120PSI, but why risk a burst line, damaged appliances or water damage inside?


The pumps usually run to about 40psi. Isn't that enough?
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